1. Product Overview
The Megaflint MFL-D1 is a keyless mechanical combination door lock designed for secure entry. It features a digital keypad and a durable stainless steel 304 construction. This lock is suitable for both exterior and interior doors, offering a convenient and secure access solution without the need for keys.
Image 1.1: Front and back view of the Megaflint MFL-D1 keyless mechanical combination door lock, showcasing the keypad on one side and the handle on the other.
Image 1.2: An alternative view of the Megaflint MFL-D1 keyless mechanical combination door lock, highlighting its design and components.
Key Features:
- Keyless mechanical operation with a digital keypad.
- Combination can be 4-8 digits, offering over 8,000 options.
- Constructed from 100% Stainless Steel 304 for durability and corrosion resistance.
- Accent lever design for comfortable use.
- Features an anti-friction spring latch (not a deadbolt).
- Suitable for wood or metal doors with a thickness between 35-50mm.
- Does not lock automatically; the handle must be pushed up to reset clear buttons and lock.
2. Important Safety Information
Please read all instructions carefully before installation and use. Failure to follow these instructions may result in damage to the product or door, and may void the warranty.
- This lock is designed only for left-handed doors that open inward.
- The handle must be pushed up to reset the clear buttons and engage the lock mechanism.
- This product is a spring latch lock, not a deadbolt.
3. Setup and Installation
This section provides general guidance for installing your Megaflint MFL-D1 lock. A detailed instruction book is included with your package for specific step-by-step procedures.
Door Compatibility:
- Door Handing: Exclusively for left-handed doors that open inward.
- Door Thickness: Suitable for doors between 35mm and 50mm (approximately 1.38 to 1.97 inches) thick.
- Borehole Type: Designed for single bore doors. The maximum borehole diameter should be 2-1/8 inches (54mm).
- Backsets: Compatible with both 2-3/8" (60mm) and 2-3/4" (70mm) backsets/latches.
Image 3.1: Diagram illustrating the requirement for single bore doors and the maximum borehole diameter of 2-1/8 inches.
Image 3.2: Detailed measurements for drilling boreholes, including diameters and distances for proper lock alignment.
Installation Steps (Summary):
- Prepare the door according to the specified borehole dimensions and door thickness.
- Install the latch mechanism into the door edge. Ensure it is oriented correctly for your door handing.
- Mount the exterior and interior lock assemblies, ensuring the spindle correctly engages the latch.
- Secure the lock assemblies with the provided screws.
- Test the lock's functionality before closing the door completely.
Refer to the included instruction book for detailed diagrams and step-by-step installation procedures.
4. Operating Instructions
Setting the Combination:
The lock comes with tumblers that allow you to set a combination of 4 to 8 digits. The specific procedure for changing the combination is detailed in the instruction book. It is recommended to change the factory-set combination upon installation.
Unlocking the Door:
- Enter your programmed 4-8 digit combination on the keypad.
- Once the correct combination is entered, the handle will be operable.
- Push down the handle to open the door.
Locking the Door:
This lock does not automatically lock. To secure the door:
- Ensure the door is closed.
- Push the handle upwards. This action resets the clear buttons and engages the lock mechanism, securing the door.
Once unlocked, you can open and close the door without re-entering the code until the handle is pushed up to re-engage the lock.
Image 4.1: A close-up view of the lock's anti-friction spring latch mechanism, clarifying that it functions as a latch and not a deadbolt.
5. Maintenance
The Megaflint MFL-D1 mechanical lock requires minimal maintenance. Regular cleaning with a soft, damp cloth is recommended to maintain its appearance. Avoid using abrasive cleaners or solvents, as these can damage the finish.
- Periodically check all screws for tightness and re-tighten if necessary.
- Do not lubricate the internal mechanism with oil or grease, as this can attract dust and impede operation.
6. Troubleshooting
If you encounter issues with your Megaflint MFL-D1 lock, consider the following:
- Lock not engaging: Ensure the handle is pushed fully upwards to reset the clear buttons and engage the lock. Check for any obstructions in the door frame or latch mechanism.
- Combination not working: Verify that the correct combination is being entered. If unsure, refer to the instruction book for how to reset or re-program the combination.
- Handle feels loose: Check the mounting screws on both the interior and exterior assemblies and tighten them if loose.
- Difficulty turning handle: Ensure the latch mechanism is properly aligned and not binding. Check for any debris in the mechanism.
For persistent issues, consult the detailed instruction book or contact customer support.
7. Specifications
| Feature | Specification |
|---|---|
| Brand | Megaflint |
| Model Number | MFL-D1 |
| Lock Type | Mechanical Combination Lock, Keypad |
| Material | Stainless Steel 304, Metal |
| Item Dimensions (L x W x H) | 10.6 x 3.2 x 7.1 inches |
| Item Weight | 3.3 Pounds |
| Door Thickness Compatibility | 35-50mm (1.38-1.97 inches) |
| Borehole Diameter (Max) | 2-1/8 inches (54mm) |
| Backsets/Latches | 2-3/8" (60mm) & 2-3/4" (70mm) |
| Combination Options | 4-8 digits, over 8,000 options |
| Included Components | Lock Set, Instruction Book |
8. Warranty and Support
Warranty:
This Megaflint MFL-D1 Keyless Mechanical Combination Door Lock comes with a Lifetime Mechanical Warranty. Please retain your proof of purchase for warranty claims.
Customer Support:
For further assistance, technical support, or warranty inquiries, please refer to the contact information provided in your product packaging or the included instruction book. You may also visit the Megaflint official website for support resources.